Reload service units:sudo systemctl daemon-reload
Save and start the service:sudo service mongodb start
Check whether it runs:sudo service mongodb status

Create a node.js express application using MongoDB

You need this package first:sudo apt-get install libkrb5-dev
Afterwards you can follow this guide from the point where he starts to install express and to create the app. With the above preparations everything else worked like he described it – you get a system based on a database model that you can edit on a webpage in no time. Have fun!